The second one is an optimal problem of displacement distribution by controlling partial surface traction distribution or varying the surface shape etc.

第二个问题是利用部分边界的边界应力分布或变化边界形状控制表面位移分布。

youdao

On a slick surface, one wheel may have no traction and begin to spin.

在光滑的地面，一个车轮会丧失牵引力，开始空转。

youdao

Sliding track was located at top surface of frame column in abnormity surface by computer synchronization controlled hydraulic traction.

利用计算机同步控制液压牵引，滑移轨道搁置在异形曲面的框架柱顶面上。

youdao

Other companies will be emboldened to follow their lead as evidence of traction begins to surface.

FORBES: Wal-Mart: A Good Plan in Africa

That division is also home to the Surface, which still hasn't seemed to gain much traction with consumers.

ENGADGET